Actually not entirely true - as with the US, canada has different regulations based on which province/state you're in. Ontario you need a license, registration (mind you the license can be just about anything... a car learners permit does me fine and registration is not a big issue usually) BC has entirely different regulations from ontario, nova scotia has a different set again... all classify just what IS a moped differently (BC no pedals is ok, ontario you have to have pedals, so on and so on)
Best thing is to check and see if your local transportation office (ministry of transportation for we canucks) has a webpage or has an info number you can call to check - with luck they can steer you in the right direction
Jamie